[PATCH v4 6/6] iommu/vt-d: Delete unused SVM flag

From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: iommu@lists.linux-foundation.org,
	LKML <linux-kernel@vger.kernel.org>,
	dmaengine@vger.kernel.org, Joerg Roedel <joro@8bytes.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Jean-Philippe Brucker <jean-philippe@linaro.com>,
	"Lu Baolu" <baolu.lu@linux.intel.com>,
	Jason Gunthorpe <jgg@nvidia.com>,
	"Christoph Hellwig" <hch@infradead.org>,
	vkoul@kernel.org, robin.murphy@arm.com, will@kernel.org
Cc: Yi Liu <yi.l.liu@intel.com>, Dave Jiang <dave.jiang@intel.com>,
	"Tian, Kevin" <kevin.tian@intel.com>,
	Raj Ashok <ashok.raj@intel.com>,
	Eric Auger <eric.auger@redhat.com>,
	Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH v4 6/6] iommu/vt-d: Delete unused SVM flag
Date: Wed, 18 May 2022 11:21:20 -0700	[thread overview]
Message-ID: <20220518182120.1136715-7-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <20220518182120.1136715-1-jacob.jun.pan@linux.intel.com>

Supervisor PASID for SVA/SVM is no longer supported, delete the unused
flag.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
 drivers/iommu/intel/svm.c |  2 +-
 include/linux/intel-svm.h | 13 -------------
 2 files changed, 1 insertion(+), 14 deletions(-)

diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index 44331db060e4..5b220d464218 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -750,7 +750,7 @@ static irqreturn_t prq_event_thread(int irq, void *d)
 			 * to unbind the mm while any page faults are outstanding.
 			 */
 			svm = pasid_private_find(req->pasid);
-			if (IS_ERR_OR_NULL(svm) || (svm->flags & SVM_FLAG_SUPERVISOR_MODE))
+			if (IS_ERR_OR_NULL(svm))
 				goto bad_req;
 		}
 
diff --git a/include/linux/intel-svm.h b/include/linux/intel-svm.h
index b3b125b332aa..6835a665c195 100644
--- a/include/linux/intel-svm.h
+++ b/include/linux/intel-svm.h
@@ -13,17 +13,4 @@
 #define PRQ_RING_MASK	((0x1000 << PRQ_ORDER) - 0x20)
 #define PRQ_DEPTH	((0x1000 << PRQ_ORDER) >> 5)
 
-/*
- * The SVM_FLAG_SUPERVISOR_MODE flag requests a PASID which can be used only
- * for access to kernel addresses. No IOTLB flushes are automatically done
- * for kernel mappings; it is valid only for access to the kernel's static
- * 1:1 mapping of physical memory — not to vmalloc or even module mappings.
- * A future API addition may permit the use of such ranges, by means of an
- * explicit IOTLB flush call (akin to the DMA API's unmap method).
- *
- * It is unlikely that we will ever hook into flush_tlb_kernel_range() to
- * do such IOTLB flushes automatically.
- */
-#define SVM_FLAG_SUPERVISOR_MODE	BIT(0)
-
 #endif /* __INTEL_SVM_H__ */
-- 
2.25.1

